Die Casting Machine http://www.die-casting-machine.com/blog It manufacture a full range of Die Casting Machine from China. Offer Die Casting Machine, Pressure Die Casting Machine with low price,high quality. Thu, 03 May 2012 02:35:51 +0000 en hourly 1 http://wordpress.org/?v=3.3.1 Hot And Cold Chamber Die Casting Machine http://www.die-casting-machine.com/blog/die-casting-machine-can-be-separated-into-two-categories/ http://www.die-casting-machine.com/blog/die-casting-machine-can-be-separated-into-two-categories/#comments Wed, 02 May 2012 03:14:07 +0000 admin http://www.die-casting-machine.com/blog/?p=163 Continue reading →]]> hot chamber die casting machine

Die casting machine used by die casting manufacturers can be separated into two categories, cold and hot chamber machines. Hot chamber machines work primarily for metals with respectively low melting points. The hot chamber die casting machine consists of a furnace, a plunger and a gooseneck tube. The die casting goes between moving injection cylinders. The cold chamber machine is used for metals with high melting points. The machine is basically the same as a hot chamber but a cold chamber replaces the furnace. These two machine types are typically used for mass-producing metal items.

After typing both casting machines into Google images the machines do not look like what I was expecting. Not that I had idea what they would look like, but these seem to be painted like train engines. Not that this is a bad thing. In my opinion, die casting machines are far prettier than the continuous and centrifugal casting counterparts. Continuous casting is mostly used to cast steel. With these machines, metal isn’t finished after the molds hardened. With centrifugal casting, there is a giant cylinder that spins the apparatus. It operates with a spring and a crucible built into a horizontal balance arm. Crowns and jewelry are made using this method.

It seems like the type of casting and machine one should use really depends on the metal and the product that is going to be made with it. I thought there was going to be preferred methods and competition between the machines but to the best of my knowledge they all serve different purposes.

]]> http://www.die-casting-machine.com/blog/die-casting-machine-can-be-separated-into-two-categories/feed/ 0 Die Casting Process http://www.die-casting-machine.com/blog/die-casting-process-2/ http://www.die-casting-machine.com/blog/die-casting-process-2/#comments Mon, 23 Apr 2012 02:56:51 +0000 admin http://www.die-casting-machine.com/blog/?p=160 Continue reading →]]> die casting machine
The basic die casting machine process consists of injecting molten metal under high pressure into a steel mold called a die. Die casting machines are typically rated in clamping tons equal to the amount of pressure they can exert on the die. Machine sizes range from 400 tons to 4000 tons. Regardless of their size, the only fundamental difference in die casting machines is the method used to inject molten metal into a die. The two methods are hot chamber or cold chamber. A complete die casting cycle can vary from less than one second for small components weighing less than an ounce, to two-to-three minutes for a casting of several pounds, making die casting the fastest technique available for producing precise non-ferrous metal parts

]]> http://www.die-casting-machine.com/blog/die-casting-process-2/feed/ 0 The company will attend India’s INTERNATIONAL DIE & MOULD SHOW http://www.die-casting-machine.com/blog/155/ http://www.die-casting-machine.com/blog/155/#comments Wed, 18 Apr 2012 04:24:37 +0000 dongfangyazhu http://www.die-casting-machine.com/blog/?p=155 Continue reading →]]> Ningbo Dongfang Die-casting Machine Tool Co., Ltd. will attend  India’s INTERNATIONAL DIE & MOULD SHOW / 8th Die and Mould India International Exhibition from 19th to 22th in Bombay.

Ningbo Dongfang Die-casting Machine Tool Co., Ltd. is famous in the industry and boosts a high reputation in domestic. The company is specialized in the manufacture of hot chamber and cold chamber die casting machines which are widely used to die casting of non-ferrous metals such as Zinc, Pb, Aluminum, Copper alloy. Now,the machines sell well in domestic and overseas, including the Asia, Europe, South America and Africa. In the past years, we have provided our clients with more than 8,000 Die-Casting Machines.

Sincerely look forward to your visit .

]]> http://www.die-casting-machine.com/blog/155/feed/ 0 Cold chamber die casting http://www.die-casting-machine.com/blog/cold-chamber-die-casting/ http://www.die-casting-machine.com/blog/cold-chamber-die-casting/#comments Mon, 16 Apr 2012 03:17:24 +0000 admin http://www.die-casting-machine.com/blog/?p=139 Continue reading →]]>        Cold chamber die casting machine and hot chamber die casting, and the major difference between them is the different type of machines that are employed. Usually, hot chamber machines are more suitable for small and light zinc products, while cold chamber die casting machine are usually used to manufacture large heavy die casting products.
       The hot chamber die casting process has been around a bit longer than the cold chamber die casting process, and it is ideal for the casting of copper, lead and zinc alloys. The hot chamber type of machine is more suitable for for casting small size die products, and very commonly the hot chamber process will have a much faster speed than the cold chamber process

]]> http://www.die-casting-machine.com/blog/cold-chamber-die-casting/feed/ 0 Die Casting Family Mold Tooling http://www.die-casting-machine.com/blog/die-casting-family-mold-tooling/ http://www.die-casting-machine.com/blog/die-casting-family-mold-tooling/#comments Wed, 11 Apr 2012 02:34:51 +0000 admin http://www.die-casting-machine.com/blog/?p=137 Continue reading →]]>

        Family die cast mold tooling is usually built to save money on multiple part types.
Family die cast mold tooling consists of a complete die cast mold or die with a few
or many different cavity die inserts that run as a single part each cycle or more
parts each cycle.
        It is the least loved of all die cast tooling types because the family die cast mold
tool needs to be removed from the die casting machine completely to change cavity
inserts for the next part. This takes time and costs the customer more money because
of machine downtime die casting machine .
       Sometimes the family die cast mold tool will have multiple cavities of different sized
parts. This will cause problems if the tool is not properly produced.
      The quality of parts from a family die cast mold tool varies with the complexity of the
parts. With multiple cavities of varying part types, it is difficult to balance the
part quantities in sets.
     Kinetic Die Casting makes parts for our customers using family die cast mold tooling. If
this is the type of tooling you own, we will be happy to produce your aluminum die cast
parts.

]]> http://www.die-casting-machine.com/blog/die-casting-family-mold-tooling/feed/ 0 The die casting of brass parts http://www.die-casting-machine.com/blog/the-die-casting-of-brass-parts/ http://www.die-casting-machine.com/blog/the-die-casting-of-brass-parts/#comments Thu, 05 Apr 2012 08:24:47 +0000 admin http://www.die-casting-machine.com/blog/?p=134 Continue reading →]]>       In the die casting of brass parts, induction brass melting usually is preferred. This form of melting will produce less melt loss through dross formation, faster melting, better control of brass composition and temperature, and less gas absorption by the metal. Speed of the brass melting also is important, to reduce vaporization of volatile alloying elements—particularly zinc.
       Fluxes are not always required in melting diecasting brass alloys. However, since dirt is unavoidable present, some fluxes may be advisable to assure cleanliness of the molten brass metals. A typical flux consist of three pounds of anhydrous borax and one pound of silica per hundred pound of brass metal.
       Whether melting for brass die casting is performed under oxidizing or reducing conditions (induction melting is oxidizing), it is preferable to keep gas absorption at a minimum, because the absorbed gas must be removed prior to pouring. When die casting brass melting is done in a neutral atmosphere, a protective cover (usually, charcoal) must be used to prevent further absorption of oxygen and hydrogen. Dissolved hydrogen is removed from the molten metal with and inert gas (usually, nitrogen).
       Cold chamber die casting machine used for die casting other die casting alloys are suitable for brass alloys. Diecast Ram pressures range from three thousand to ten thousand psi. Speed of the die casting plunger may vary from ten to two hundred and fifty psi. Regulation of speed, pressure, gating, venting, and die temperatures are essentially the same… and influence the quality of the die castings the same as with aluminum die castings and zinc die castings.
       Tungsten hot work tool steels (H-20, H-21 and H-22) heat treated to Rockwell C38 to C45 are more commonly used for die casting molds and cores used for die casting brass. Moving parts not exposed to molten brass metal can be made of H-13 or 6145 heat treated to Rockwell C40 to C50.
       The surface finish on die casting mold cavities must be satin or matte for purposes of surface tension. For die casting thin-wall parts, a die casting mold life of 40,000 to 50,000 shots can be expected, in yellow brass die cast parts. For alloys requiring higher metal temperatures, die casting mold life can fall to 10,000 die casting parts.
       In die casting brass, the die cast mold life usually is given higher consideration than surface finish of the casting. If temperatures are too low, scrap parts are produced. If the die temperature is too high, blistering will occur. Normal diecasting mold and core temperatures are between 600-1300F. Oil or water usually is circulated through the die to control die temperatures. Die lubricant is used sparingly in die casting brass, since lubricant has the tendency to burn into the brass part casting and result in defective die cast brass parts. Generally, oil and/or graphite is used on die casting plunger tips or a spot where release of the diecasting is a problem.

]]> http://www.die-casting-machine.com/blog/the-die-casting-of-brass-parts/feed/ 0 Zinc Die Casting Tooling http://www.die-casting-machine.com/blog/zinc-die-casting-tooling/ http://www.die-casting-machine.com/blog/zinc-die-casting-tooling/#comments Tue, 27 Mar 2012 07:41:07 +0000 admin http://www.die-casting-machine.com/blog/?p=131 Continue reading →]]>        Different Types of Zinc Die Casting Tooling. The discovery of the zinc metal in combination with tin, lead copper, aluminum and magnesium to form inexpensive metal parts have led to many companies to produce different types of die casting tooling to produce various metals that are very much in demand. The first alloys discovered were combinations of lead and tin but after zinc, aluminum, magnesium and copper were incorporated in alloy production, the new types of die casting processes die casting machine  were developed to meet the growing demands for metal parts. In the past the molds were simply of cement and ceramics and low pressure die casting was the known process used. Today with the introduction of steel molds and the technology in high pressure casting, the process is faster and more reliable to produce high quality parts of all sizes and forms.
       The new technology in die casting has been developed because of the great demand for metal parts in almost all aspects of human activities. Wherever a machine is operating the need for zinc metal parts will exist because of toughness of zinc alloys and their being shapeable into just about any form conceivable by the design engineers. All these demand for metal parts have pushed many companies into producing different types of die casting tooling that will be needed for the production of the metal parts. These companies can help in the design of the die casting tools needed and can formulate the manufacturing processes needed. For the companies that do not desire to produce their own metal parts, they can just send their specifications and order their requirements from these die casting companies.

]]> http://www.die-casting-machine.com/blog/zinc-die-casting-tooling/feed/ 0 Different Types of Hot Chamber Die Casting Parts http://www.die-casting-machine.com/blog/different-types-of-hot-chamber-die-casting-parts/ http://www.die-casting-machine.com/blog/different-types-of-hot-chamber-die-casting-parts/#comments Tue, 27 Mar 2012 07:38:23 +0000 admin http://www.die-casting-machine.com/blog/?p=129 Continue reading →]]>        Different Types of Hot Chamber Die Casting Parts. There are many companies that can produce different types of hot chamber die casting parts. They produce complex miniature parts from die casting tools that have been designed for this purpose die casting machine . The usual production process is the Hot Chamber Zinc die casting process. In this process, zinc is first melted into liquid form in a furnace at temperatures reaching 800 degrees Fahrenheit. The molding tool is engaged to inject the liquefied zinc into the mold under high pressure by the hydraulic system. The zinc solidifies and formed in the mold and subsequently released in a matter of seconds already formed according to the shape of the mold. These formed zinc parts are then brought to finishing processes like trimming, painting, anodizing, chrome plating and final assembly depending on the usage of the produced parts.
       This type of process is used for metals of low melting points like zinc in combination with lead, copper, magnesium to produce different types of hot chamber die casting parts. These are parts that do not erode the cylinders or plungers of the steel mold as they are malleable at high temperatures. Furthermore, the process takes place in just a few seconds making the mass production of these die casting parts fast and efficient. These steel molds or dies are reusable after production of the zinc metal parts and may be kept for future use.
       The design of the mold is important in production and the type of die casting tools must match the steel molds design and the production processes involved. For this the consultants of different companies producing the die casting tools are more than willing to assist customers by helping in the design of the machines intended for use to produce different types of hot chamber die casting parts.

]]> http://www.die-casting-machine.com/blog/different-types-of-hot-chamber-die-casting-parts/feed/ 0 Die casting machines are designed http://www.die-casting-machine.com/blog/die-casting-machines-are-designed/ http://www.die-casting-machine.com/blog/die-casting-machines-are-designed/#comments Mon, 19 Mar 2012 08:03:37 +0000 admin http://www.die-casting-machine.com/blog/?p=126 Continue reading →]]>        Die casting machine are designed to perform all these functions. To be effective these machines should be strong and rigidly built to take up die weights and provide holding pressures against the pressure of the molten metal. The machine frame should hold the die halves rigidly in correct alignment. The die holding forces should be in excess of the maximum force developed by the molten metal to ensure leak proof joint in the dies. The die closing and locking arrangements generally used in the die casting machines include hydraulic, hydraulic mechanical or mechanical devices depending on the capacity of the machine.

]]> http://www.die-casting-machine.com/blog/die-casting-machines-are-designed/feed/ 0 The Hidden Heart of Die Casting http://www.die-casting-machine.com/blog/the-hidden-heart-of-die-casting/ http://www.die-casting-machine.com/blog/the-hidden-heart-of-die-casting/#comments Mon, 12 Mar 2012 08:00:06 +0000 admin http://www.die-casting-machine.com/blog/?p=122 Continue reading →]]>        The role of the plunger system in the die casting machine process is deceptively simple.  Molten alloy is poured into one end of the shot sleeve and pushed out the other end.  This is done repeatedly, and as quickly as possible.  The effective operation of the plunger system is essential to productive die casting, for an unusual reason.  The real worth of an effective plunger system is not measured by what it does, but by what it doesn’t do.  That is, an effective plunger system does not make good die casting happen, it allows it to happen.  Let me explain.
       In an ideal die casting production process, it is very important that the shot end system be virtually invisible.  Castings should be made rapidly and repeatedly, one after another, without interruption or delay.  These castings will have no porosity, no non-metallic inclusions, and be both dimensionally and mechanically perfect for the intended application.  For this to happen, the plunger system must be so well designed and maintained, that the die caster can simply take for granted the fact that it will never interrupt the repetitive die casting cycle, or delay it in any way.  The only factors limiting the speed and consistency of production should be the alloy being used, the required dimensional and mechanical properties of the part, and its finish.  The plunger must therefore repeatedly run quickly and smoothly through a properly lubricated perfectly round and straight shot sleeve, while maintaining a constant gap.  An absolutely reliable plunger system is in truth the hidden heart of any successful die casting process.
       A Critical Interaction
       The interaction between the plunger and the shot sleeve is critical.  Unless each is operating at close to optimum efficiency, the operating life of both will be substantially reduced.
       Four thousandths of an inch (0.102mm) is the maximum allowable gap between the plunger tip and the shot sleeve during the casting process.  If at any time during the shot, the gap exceeds 0.004”, the alloy is likely to penetrate the space, and flash or blowby will occur. This will inevitably cause excessive wear on both the shot sleeve and the plunger tip. If the gap becomes much less than 0.004”, there is a danger of interference that will cause inconsistent shot velocity.  Scrap will result.  It is essential, therefore, that a gap that is never more than four thousandth of an inch be maintained at all times during the casting cycle.
        Dimensional stability of both the plunger tip and the shot sleeve is imperative, It can only be achieved through thermal stability.  The temperature of both the plunger tip and the shot sleeve must therefore be controlled at all times…
       Thermal Expansion
       Unfortunately, when metal is heated it expands.
       The clearance between the plunger and the shot sleeve never remains constant.  At the start of the casting cycle, at the pour end the sleeve is very hot, and the plunger tip is comparatively cool.  As the plunger moves forward toward the die end, the tip becomes hotter.  At the end of the injection stroke, the sleeve dissipates heat to the platen and the die, and cools.  The tip therefore expands while the shot sleeve contracts.  If the initial clearance at the pour end is small enough to prevent penetration of the alloy past the tip of the plunger, and the temperature of both plunger and shot sleeve are not adequately controlled, the plunger may seize in the sleeve before reaching the end of the stroke.  The chance of this happening increases with the length of the shot sleeve.
       Incomplete Runs
       A problem that is shared by most die casters is the unplanned downtime that is caused when casting must be discontinued before the scheduled production run has been completed.  This can be caused by many factors.
       The incidence of uncompleted runs has proven to be greatly reduced and often completely eliminated by the adoption off thermally controlled shot sleeves, an effective lubrication system, modular plunger and high speed vacuum valves.  Each contributes to improved productivity.  Combined, these interactive components combat a number of costly problems that have traditionally been considered inevitable by many die casters.
       Conclusion
       “You can count on it.”  This is the highest praise for any die casting shot end system.  One good quality shot sleeve and plunger combination seldom produces product markedly better or more quickly than another.  Consistency and longevity, however, distance a superior system from the rest.
       The plunger system is, indeed, “The Hidden Heart of Die Casting”.   The heart is an apt analogy, because the die caster must be able to count on the plunger – shot sleeve system to neither falter nor fail.
       The die caster will then simply fill the die as quickly as he can, Empty it as quickly as he can.  And continue to do this as often and as long as he can.

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