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Topic: Moulding (process)

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	Process for making a toothbrush - Patent 6066282
		A process according to claim 4 wherein the second engagement part, on the handle, is formed engaged around the said projection in the manner of a socket surrounding the end of the projection such that the head and handle are retained together by a male-female type of engagement.
		A process according to claim 3 wherein the second engagement part, on the handle, is formed engaged around the said projection in the manner of a socket surrounding the end of the projection such that the head and handle are retained together by a male-female type of engagement.
		A process according to claim 1 wherein the first engagement part comprises a concavity in the basal end of the head, into which plastic material introduced during the moulding process in which the handle is made may flow and engage with the concavity.
	www.freepatentsonline.com /6066282.html (3919 words)

	Injection moulding - Wikipedia, the free encyclopedia
		Considerable thought is put into the design of moulded parts and their moulds, to ensure that the parts will not be trapped in the mould, that the moulds can be completely filled before the molten resin solidifies, to compensate for material shrinkage, and to minimize imperfections in the parts.
		Moulds separate into at least two halves (called the core and the cavity) to permit the part to be extracted.
		The quality of the moulded part depends on the quality of the mould, the care taken during the moulding process, and design details of the part itself.
	en.wikipedia.org /wiki/Injection_moulding (1528 words)

	Micromoulding - Small is the Big Issue
		The purchase of a moulding machine requires a high level of investment; producing moulds with fine detail is time consuming and expensive, and skilled process technicians are required to optimise the production process.
		In micromoulding the speed of injection into the mould must be fast to allow the material to pass through the much smaller feed point of the moulding cavity to fill the thin sections of the moulding.
		The mouldings are small and they can be difficult to handle, which is compounded by the creation of static electricity during the moulding process; the small mass of the micromoulded parts makes them susceptible to clinging to any nearby surface (Figure 3).
	www.sovrin.co.uk /medical-device-micro-moulding-p2.htm (434 words)

	Injection Molding Magazine
		This process requires a special hot stamping foil, a foil feeding device attached to the moving platen of the moulding machine, and an injection mould modified to accommodate the IMD process.
		Insert moulding encompasses the decoration of plastic parts inside the mould by means of 3-D thermoformed and cut insert foils (the inserts), which are placed in the mould before injection.
		Surface structures in the injection mould are apparent on the insert moulding foil.
	www.immnet.com /articles?article=486 (1137 words)

	INTRODUCTION TO SHELL MOULDING PROCESS
		Shell moulding is a process for producing simple or complex near net shape castings, maintaining tight tolerances and a high degree of dimensional stability.
		Fireclay is applied along the edges of the mould to avoid leakage of the molten metal.
		The molten aluminium silicon alloy was poured in the cavity of the shell mould.
	www.metalwebnews.com /howto/shell-moulding/shell-moulding.html (574 words)

	Injection Moulding (Site not responding. Last check: 2007-10-11)
		In addition, leading-edge technologies may be used in the construction of moulds as well as in the injection-moulding process itself to combine cost-efficient production, outstanding process precision, and the integration of a wider range of functions into the component.
		As the frequency emitted by the radar module was high and wave lengths were correspondingly short, the dimensions of the waveguide integrated in the mould could be kept to a compact minimum.
		In-mould decoration is regarded as one of the most important processes used in the manufacture of automobile interior fitments.
	www.ict.fhg.de /english/scope/pt/pt-spritz5.html (889 words)

	Moulding
		The inside mould, or the bell's core, is then made, and on top of that, the outside mould.
		For the casting of bells a mould of two parts is needed: one for the inner and one for the outer form of the bell.
		Once hardened, the outer mould, the so-called mantle, is lifted; destroying the false bell in the process.
	www.eijsbouts.com /moulding.htm (404 words)

	Method of controlling the afterpressure variation with time of an injection-moulding machine - Patent 4983336
		During injection-moulding, the pulverulent or granulated moulding mass is plastified by heating with the aid of a heating means arranged at the worm housing and is pressed during the mould filling stage (mould filling time) into the moulding tool by axial displacement of the worm in the direction of the injection nozzle.
		If the moulding to be injection-moulded consists not only of a typical moulding, a typical moulding must be the, which forms part of this moulding to be injection-moulded and whose realization during injection-moulding is most difficult must be used for calculation.
		The moulding tool 11 is pressed against the injection nozzle 8 by means of a pressure device not shown here further and which detaches, after termination of the injection-moulding process the moulding tool 11 from the injection nozzle 8 and ejects the solidified moulding after termination of the injection-moulding process.
	www.freepatentsonline.com /4983336.html (2740 words)

	Rotational Moulding Design and Process by Oaklands Plastics - Rotational Mouldings Specialists
		Rotational moulding is used for producing hollow plastic items, from the very simple to the very complex, allowing higher quality and more intricate designs to be produced than would be possible with other moulding and extrusion processes.
		Rotational moulding differs from other processing methods in that no external pressure is applied during forming, because the heating, melting, shaping, and cooling stages all occur after the polymer is placed in the mould.
		As the mould rotates, its inner surface passes continually through the mass of powder at the bottom of the mould which fuses and adheres to the mould surface.
	www.oaklandsplastics.com /rotational-moulding.htm (476 words)

	IKV - Injection Moulding
		The injection moulding department currently has a staff of more than 25 engineers and technicians who, with the support of some 100 students, are engaged in the further development of mechanical, mould and process engineering.
		Processes such as the fluid assisted injection moulding, in-mould decoration, powder injection moulding and co-injection moulding are being subjected to both analytical and practical investigation in a bid to provide the user with guidance in the assessment and application of these processes.
		In addition to a large number of conventional injection moulding machines, the injection moulding department has co-injection and fluid injection units, an all-electric machine, a micro-precision injection moulding machine and the appropriate equipment for the injection moulding of thermo-plastics, elastomers and thermosets at its disposal.
	www.ikv-aachen.de /abt.sg/ikv_sge.html (554 words)

	New Product: Mazda Develops New Injection Moulding Process
		But as these parts are press moulded, it is difficult to combine multiple parts, use deep ribs as an efficient way to increase rigidity and strength, or to achieve thin moulding thicknesses.
		In order to reduce the damage to the glass-fibre during the moulding process, Mazda uses a polypropylene base material with extremely low viscosity to decrease the amount of pressure applied to the glass-fibre.
		The strength of the injection moulded parts is further boosted by adding a new type of polypropylene with a high crystalline structure to the mixture to form a composite.
	www.azom.com /details.asp?ArticleID=1113 (834 words)

	Injection moulding process explained
		Plastic material in the form of granules is melted until soft enough to be injected under pressure to fill a mould.
		Once the plastic moulding has cooled sufficiently to harden the mould opens releasing the part.
		The length of time from closing the mould to ejecting the finished plastic moulding is the cycle.
	www.rutlandplastics.co.uk /moulding_process.html (206 words)

	On-Line Monitoring of Thermosets Moulding Process Applying Ultrasound
		The manufacturing process is more complex than for non-reactive thermoplastics since two steps must be controlled within a few seconds: the mould filling operation with molten compound and curing reaction in the hot mould.
		Moulding compounds are mixtures of reactive resins, hardener and fillers.
		High pressures are needed to ensure that the high viscosity material fills the mould and to avoid bubbles caused by the steam pressure of locked in water.
	www.ndt.net /article/wcndt00/papers/idn480/idn480.htm (2161 words)

	Manufacturing techniques for plastic components
		Compression moulding is a process used on thermosetting plastics where heat and pressure are applied to the moulding material by the mould surfaces.
		As the blow moulding process involves stretching a fixed mass of material areas such as corners and protrusions, interior or exterior, are inherently complicated to produce without causing a reduction in part wall thickness.
		Once the mould is placed on the shelf and the thermoplastic is clamped in position, a heating unit is used to heat the material to a soft state that will facilitate the moulding process.
	people.bath.ac.uk /en3dra/M.html (1631 words)

	:: Vinodrai Incorporated - INDIA :: (Site not responding. Last check: 2007-10-11)
		Mould movement and mould heating are the two most important functions of a rotational molding machine.
		The process is control by diff parameter of molding therefore in biaxial it is possible to produce qualitative and economical tanks.
		The mould is simultaneously rotated on two perpendicular axis the spindle turns on the major axis while the mould rotates on the minor axis.
	www.vinodrai.com /Process.asp (1874 words)

	Plastic Moulding: Process, Polymers & History
		The history of rotational moulding began somewhere between 1940 and 1950 in the USA when the process was developed for a small number of plastics.
		By the late 1950s, when the rotational moulding process was better understood, applications for other industries were developed including road cones, marine buoys, and car armrests.
		A process was developed in Europe in the early 1960s that enabled large hollow containers to be created in low density polyethylene (LDPE) by rotating (or rocking) a mould on a chassis, houses open gas jets, through 30 degrees which coated the inside of the mould with the polymer...
	www.plasticmoulding.ca (311 words)

	The Powder Injection Moulding Process
		PIM is a derivative of polymer injection moulding and uses much of the same technology, along with batch sintering processes used in powder metallurgy and ceramic processing.
		Binder and powder are injected from the barrels sequentially so that in the mould the binder/powder mix from the first barrel forms the skin of the component, and that from the second barrel forms the core.
		The addition of short fibres provides a potential mechanism for the improvement of properties such toughness, and the injection moulding process enables the control of both the distribution and orientation of the fibres.
	www.azom.com /details.asp?ArticleID=1080 (1289 words)

	CASA - Flow Front Instabilities in an Injection Moulding Process.
		During an injection moulding process, a process that is often used for the production of plastic objects, molten polymer is injected into a mould.
		One of the processes that is considered to be responsible for this kind of distortions is an instability of the motion of the flow front during the filling phase of the injection moulding process.
		Since the walls of the mould are cooler than the temperature of the fluid itself, the viscosity of the fluid will be higher near the walls than in the main part of the fluid.
	www.win.tue.nl /casa/research/casaprojects/gramberg.html (891 words)

	Injection blow moulding equipment for blow molding plastic bottles and containers for pharmaceuticals, toiletries and ...
		The heart of the injection Blow moulding process is a triangular rotary table, which indexes in 120° steps.
		After suitable conditioning, the moulds open and the parison is transferred on the core rod to...
		The mould opens and the finished bottle is transferred on the core rod to...
	www.jomarcorp.com /ibm_process.asp (448 words)

	Nitrile gloves: Good alternative to latex product
		Dip moulding involves the lowering of a form or mandrel into a polymer bath, attracting a thin liquid film deposition onto the form or mandrel after raising from the bath.
		Until 1985, clip moulding was a slow growth industry residing primarily in the USA and Europe, in an oligopoly type Of industry with few players.
		The process is somewhat labour intensive, but can be softened by careful consideration of oil line chlorination, which chlorinates one side of the glove on tile dip moulding line.
	www.accautomation.com /art3.htm (1745 words)

	IKV - Injection moulding / Special injection moulding processes
		The injection-compression moulding process combines elements of both the injection moulding process and the compression moulding process.
		In the case of parts decorated with textiles or film, it is the residual foam thickness that remains after moulding that is the main focus of attention.
		The IKV is developing new application potential for this process in research projects and in direct cooperation with industry and is also compiling the necessary process knowledge.
	www.ikv.rwth-aachen.de /abt.sg/sonder1e.html (567 words)

	MIM Metal Injection Moulding process
		The MIM (Metal Injection Moulding) process was developed in the early '90s in the United States, mainly for use in the military sector.
		Main goals of the MIM process are to realize average-small pieces with a complex shape, in average-big lots, in high-resistance materials, using as much automated working cycles as possible.
		Moulding is got by ordinary injection moulding processes, at a high-speed production rate and minimum faultiness.
	www.microfond.it /mim_metal_injection_moulding.htm (354 words)

	Injection Moulding - Teknek Sub-Contract Division
		Injection moulding is a manufacturing process where heated plastic is forced into a mould cavity under pressure.
		Typically injection pressures range from 5000 to 20,000 psi and because of the high pressures involved, the mould must be clamped shut during injection and cooling.
		The moulding tools must be manufactured to high levels of precision and must be robust enough to withstand the moulding process.
	www.teknek.com /subcontract/moulding/injection_moulding.htm (166 words)

	Technical moulding
		The principle of this process is that nitrogen gas is injected, during the moulding cycle, either through the sprue or directly into the mould tool.
		A 220 tonne Arburg ST570C machine provides the technology to produce innovative mouldings such as two moulded colours for decorative purposes or two materials, such as moulded-in seals or tactile areas, saving on manufacturing time and later assembly costs.
		Moulded parts can now have precision drilled holes which cannot be guaranteed within the moulding process.
	www.aki.co.uk /page/Technical_moulding (289 words)

	Cove Plastics Ltd: Dip moulding process (Site not responding. Last check: 2007-10-11)
		Dip moulding is exactly what the name suggests; A former is preheated and then dipped into the PVC plastisol and allowed to dwell.
		It is probably the most simple of all the moulding processes but certainly it is a very flexible and cost effective one that has applications in many if not all industries.
		The most obvious limitation of dip moulding is the use of a male only type former which gives a hollow moulding.
	dspace.dial.pipex.com /prod/dialspace/town/pipexdsl/t/atej13/NewCPL/guideprocess.htm (618 words)

	ARBURG - ALLROUNDERs, precision moulding machines
		In the precision moulding sector there is a demand for machines which feature a high degree of precision and reproducibility.
		If the machines used for precision moulding are equipped with an electro-mechanical dosage drive it is possible to achieve greater dosing accuracy, reduced energy consumption and in some cases shorter cycle times.
		The accuracy of the servo-electric drive increases the precision and reproducibility of the injection moulding process, since precise deactivation at the end of the dosing process ensures that the dosing volume can be repeated with a greater degree of accuracy.
	www.arburg-injection-moulding-machines.com /precision-moulding.htm (187 words)

	Injection Moulding of Plastics
		General understanding- that once the mould is filled with the melt every thing has to be perfect- is not correct.
		Moulding refers to shaping of plastic melt inside the mould.
		Understanding the moulding process from the point of view of understanding the settings of process controls in the microprocessor controlled machine.
	in.geocities.com /bolurpc/mainpage.html (924 words)

	Injection Moulding
		In essence, injection moulding is a process whereby a solid thermoplastic material is heated until it reaches a state of fluidity, is then transferred under pressure (injected) into a closed space (mould cavity), and is then cooled in the mould until it again reaches a solid state, conforming in shape to the mould cavity.
		Historically, injection moulding is similar to the centuries old process of metal casting, in which molten brass or iron is poured into a closed mould made of sand or plaster.
		While much of the work done at the Institute of non-Newtonian Fluid Mechanics is sponsored by polymer industrialists, significant progress has been made in all areas, for example in the simulation of the injection moulding process, using finite element methods.
	www.cs.swan.ac.uk /~cs-gkazi/innfm/injmould.html (206 words)

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