scholarly journals Frame Work on an Injection Molding Rejuvenation Technique for Cable Insulation Failure

2021 ◽  
Vol 235 ◽  
pp. 01046
Author(s):  
ChongWei Lv ◽  
YongXiang Zhao ◽  
JunGuo Wang ◽  
ZhiWei Liu
Keyword(s):  
Injection Molding ◽  
Mechanical Damage ◽  
Cable Insulation ◽  
Plastic Molding ◽  
Material Development ◽  
Water Tree ◽  
Insulation Failure ◽  
Local Standard ◽  
Standard Geometry ◽  
Frame Work

Rejuvenation technique on cable insulation failures is a hot topic in improving production benefits for electric related enterprises. Breaking the traditional thought of repair action without extensive former damage in scale of the cable insulation, the proposed technique starts from the local standard geometry elimination on insulation or sheaths around cable insulation failure section(s). And then, one standard injection molding technique is applied for rejuvenation on eliminated insulation no matter of the failure resulting from water tree or local mechanical damage or other modes. By this advancement, an injection molding technique is perfectly developed for rejuvenation on cable insulation failure. Frame work on this technigue is hear introduced and it consists of three branches including injection molding material development, standard injection plastic molding technique, and coded quality approval regularities. Realizability and reliability of the present technigue have been verified by sampling testing to expect to be wide applied in production.

scholarly journals Mould and Process of an Injection Molding Rejuvenation Technique for Cable Insulation Failure

2021 ◽  
Vol 235 ◽  
pp. 01030
Author(s):  
XiaoJian Yang ◽  
YongXiang Zhao ◽  
JunGuo Wang ◽  
ZhiWei Liu
Keyword(s):  
Injection Molding ◽  
Standard Process ◽  
Cable Insulation ◽  
Insulation Failure ◽  
Quality Testing ◽  
Present Technique ◽  
Standard Mode

Mould and process are developed for an injection molding rejuvenation technique of cable insulation failure. Disregard the traditional clue that repair does not expand original damage in size and space, a new rejuvenation technique, i.e. injection molding, is developed for restoring cable insulation failure. In this technique the uncertain damage in size and space was replaced by a standard eliminated size and space. In this way, an expanded original damage with certain size and space is firstly made around cable insulation failure section. But the damage situation was modified to a standard mode so that a mould technology can be well applied to filling the modified size and space. In addition, the bigger size and space is applied by mould for over-filling the modified size and space. Then a standard process should be constructed by the repair practices till the quality testing verifies that a successful rejuvenation is reached. Applied practice has verified the applicability and availability of the present technique.

Oxidation and Water Tree Formation in Service-Aged XLPE Cable Insulation

1987 ◽  
Vol EI-22 (4) ◽  
pp. 405-412 ◽  
Author(s):  
A. Garton ◽  
S. Bamji ◽  
A. Bulinski ◽  
J. Densley
Keyword(s):  
Cable Insulation ◽  
Xlpe Cable ◽  
Water Tree

scholarly journals Prototype Sistem Deteksi Partial Discharge Pada Isolasi Kabel Menggunakan Sensor Microphone (Prototype Of Partial Discharge Detection System In Cable Isolation Using Microphone Sensor)

2019 ◽  
Vol 3 (2) ◽  
pp. 206
Author(s):  
Mochamad Zaeynuri Setiawan ◽  
Fachrudin Hunaini ◽  
Mohamad Mukhsim
Keyword(s):  
Detection System ◽  
Partial Discharge ◽  
Measurement Data ◽  
Negative Ions ◽  
High Sensitivity ◽  
Sound Waves ◽  
Cable Insulation ◽  
Insulation Failure ◽  
Measurement Results ◽  
Discharge Detection

The phenomenon that often arises in a substation is the problem of partial discharge in outgoing cable insulation. Partial discharge is a jump of positive and negative ions that are not supposed to meet so that it can cause a spark jump. If a partial discharge is left too long it can cause insulation failure, the sound of snakes like hissing and the most can cause a flashover on the outgoing cable. Then a partial discharge detection prototype was made in the cable insulation in order to anticipate the isolation interference in the outgoing cable. Can simplify the work of substation operators to check the reliability of insulation on the outgoing side of each cubicle. So it was compiled as a method for measuring sound waves caused by partial discharge in the process of measuring using a microphone sensor, the Arduino Mega 2560 module as a microcontroller, the LCD TFT as a monitoring and the MicroSD card module as its storage. The microphone sensor is a sensor that has a high sensitivity to sound, has 2 analog and digital readings, and is easily designed with a microcontroller. Basically the unit of measure measured at partial discharge is Decibels. The results of the prototype can be applied to the cubicle and the way it works is to match the prototype to the outgoing cubicle cable then measure from the cable boots connector to the bottom of the outgoing cable with a distance of 1 meter. Then the measurement results will be monitored on the TFT LCD screen in the form of measurement results, graphs and categories on partial discharge. In this design the measurement data made by the microphone can be stored with microSD so that it can make an evaluation of partial discharge handling in outgoing cable insulation.

scholarly journals (MOLDING DESIGN OF PADANG STATE POLYTECHNIC LOGO SOUVENIR MOLDING ON PRESSED PLASTIC INJECTION MOLDING MACHINE 1,960 KG / CM²)

2021 ◽  
Vol 16 (2) ◽  
pp. 93
Author(s):  
Alfian Alfian
Keyword(s):  
Injection Molding ◽  
Manufacturing Process ◽  
Plastic Injection Molding ◽  
Basic Material ◽  
Control Panel ◽  
Molding Machine ◽  
Injection Molding Machine ◽  
Plastic Molding ◽  
Injection Unit ◽  
Plastic Injection

ABSTRACT Padang State Polytechnic has been established since 1987 under the name Polytechnic Engineering and then changed its name several times to the management policy by Andalas University then, until now it is independent until now with the name Padang State Polytechnic. The 33-year-old polytechnic of the Padang State Polytechnic establishment must have an icon, symbol and trinkets that have PNP characteristics so that they are easy to recognize and remember. Souvenirs are a form of applying media for promotion and souvenirs for people who already know and come to Padang State Polytechnic. Plastic injection molding machine is a machine used to mold plastics with a basic material in the form of plastic pellets. Plastic injection molding machine is the process of processing plastic material in the form of seeds which are heated until they become liquid and then injected into the molding which then freezes / hardens according to the shape of the mold. The products produced by injection molding machines vary, from electronic tools, automotive tools, home appliances, plastic souvenirs, to tableware. The success of the resulting product is highly dependent on Molding. The plastic injection molding machine has parts, namely the Injection Unit, Molding Unit and Clamping Unit. The Injection Unit and Clamping Unit are the most important parts in the manufacturing process of plastic products where the control operation is executed on the control panel found on the plastic injection molding machine. The control panel on the machine can adjust the amount of clamping pressure, stroke length, plastic volume, and temperature used. The molding unit is the main part of the plastic product manufacturing process. Mold (mold) is a tool / tool used to make products according to the desired design (shape and dimensions). Plastic molding has its respective functions, parts of the mold, namely Cavity and Core, Sprue, Runner and Gate, Undercut. The printing process on a Plastic Molding machine has several stages such as the cutting process, mold safety and machine safety, execution, product check, setting, execution, and final. Materials used in the Plastic Molding process are usually materials that are often used daily and are safe for use by all groups, such as Polyproplene, Polycarbonate, and High Density Poly Ethylene. The product that will be produced from the molding made is a key toy souvenir made of plastic, with a shape like the Padang State Polytechnic logo, measuring 6 cm long, 6 cm wide and 5 mm thick. The test results obtained will be shown through field applications, socialization at the Padang State Polytechnic and writing in national journals are the targets and outputs of this novice lecturer research activity. Keywords— Mold, Souvenir, Cavity, Core, Pnp.

Effect of silane-grafting on water tree resistance of XLPE cable insulation

2010 ◽  
Vol 115 (6) ◽  
pp. 3168-3176 ◽  
Author(s):  
Zhishen Ma ◽  
Xingyi Huang ◽  
Pingkai Jiang ◽  
Genlin Wang
Keyword(s):  
Cable Insulation ◽  
Xlpe Cable ◽  
Water Tree ◽  
Tree Resistance

Modeling of Mechanical Damage in Traditional Brickwork Walls after Fire Exposure

2014 ◽  
Vol 919-921 ◽  
pp. 495-499 ◽  
Author(s):  
Francesca Sciarretta
Keyword(s):  
Mechanical Properties ◽  
Heat Flow ◽  
Fire Resistance ◽  
Mechanical Performance ◽  
Thermal Strain ◽  
Mechanical Damage ◽  
Numerical Approach ◽  
Masonry Walls ◽  
Fire Exposure ◽  
Insulation Failure

The paper addresses the issues of fire behavior of masonry walls made of traditional/historical component materials (bricks and mortar).There are reasons for coupling investigations on the residual mechanical properties to fire resistance data, aiming at a more complete knowledge of the behavior of a masonry member during and after fire exposure. The paper proposes a numerical approach via FEM to the problem of residual mechanical performance of load-bearing fire-separating masonry walls after insulation failure. The goal is to establish relationships between fire resistance ratings under exposure and decay in mechanical properties after exposure; the parameter of wall thickness is especially investigated. This is performed by means of FEM analysis, simulating a standard ISO 834 fire resistance test followed by a mechanical compressive failure test on each investigated type of wall. First, a preliminary transient heat flow analysis gives a numerical prediction of fire resistance after violation of I (Insulation) criterion; then, a staggered heat flow - stress analysis repeats the heating of the wall up to insulation failure and calculates the thermal strain accounting for cracking; finally, a 'cold' structural analysis in compression is performed on the thermally-deformed model after cooling. The comparison of numerical outcomes to available experimental information allows to judge the reliability of the numerical approach in reproducing the residual behavior of a masonry wall after fire exposure.

The Shell of Internal Combustion Tamping Pickax Injection Molding CAE Technology Research

2011 ◽  
Vol 415-417 ◽  
pp. 339-342
Author(s):  
Li Min Sun ◽  
Jing Chao Zou
Keyword(s):  
Injection Molding ◽  
Flow Field ◽  
Mathematic Model ◽  
Internal Combustion ◽  
Mold Filling ◽  
Technology Research ◽  
Plastic Molding ◽  
Injection Molding Cae ◽  
Cae Technology ◽  
Plastic Housing

This article establish the physical and mathematic model of the plastic housing of the ND-5 internal combustion tamping pickax by plastic molding CAE, analyse the flow field in injection molding. We simulate many programs of the injection molding processing , analyze the mold-filling characteristic of the programs, study the defect situation and select the best injection molding program for the moulding.

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