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13 12, 2016

Plastic mold common failure form – shrinkage

There exits shrinkage in surface of die cast mold. I will introduce you in details as followings: Features: Shrinkage hole is the surface of the die cast mold surface or the existence of a surface rough hole. There also are a lot of small shrinkage hole, that is, shrinkage. Shrinkage often occurs in the castings near the runner, riser root, thick parts, the thickness of the wall junction and has a large plane of the thickness. Causes: The temperature control of die cast mold does not meet the directional solidification requirements. The choice of paint is improper, different parts of the coating layer thickness control is not good. The casting mold in the position of improper design. Pouring riser design failed to achieve the full complement from the role. Pouring temperature is too low or too high. Control methods: Improving the abrasive temperature. Adjusting the [...]

10 12, 2016

Plastic mold common failure form – Wear and corrosion

Plastic injection mold wear due to thermo setting plastics generally contain a certain amount of solid filler, softened after heating, melting plastic into a "hard spot", punch mold cavity, and the mold cavity surface friction, resulting in type Cavity surface roughing, surface roughness becomes large and lose their luster, which will affect the appearance of plastic parts quality. Therefore, once found on the surface of the mold cavity nap phenomenon, should be promptly removed polishing. And after several polished cavity expansion, strict requirements on the size of plastic injection mold will be out of tolerance and failure. For example, the hardened tool steel bakelite die after a continuous pressure of 1.5 to 25,000, the mold surface wear thickness of 0.01 mm. There are data that mold 80,000 times as a filler of glass fiber plastic mold cavity wear is the amount of ordinary bake lite [...]

6 12, 2016

What can we supply?

Our unique system, proprietary technology platform and a team of expert engineers and mold makers allow us to turn your 3D CAD model into a fully functional prototype or production part using real engineered grade resins, more consistently and affordable than any other rapid injection molding company. It starts with our auto parts mold system. We have developed software to significantly increase the speed of the mold building process. We can reduce a typical mold build time of 6-12 weeks to just a few days. Once the mold is created in a matter of days, it goes through our Proprietary Process Engine; the driving force behind our injection molding process. It carefully analyzes and guides our technicians to ensure optimal conditions to help create your consistent custom molded plastic parts. Our Process Our company is mold maker. Start your project off right with the experience [...]

3 12, 2016

Do you know the history of die casting mold?

The earliest examples of die casting molding by pressure injection - as opposed to casting by gravity pressure - occurred in the mid-1800s. A patent was awarded to Sturges in 1849 for the first manually operated machine for casting printing type. The process was limited to printer’s type for the next 20 years, but development of other shapes began to increase toward the end of the century. By 1892, commercial applications included parts for phonographs and cash registers, and mass production of many types of parts began in the early 1900s. The first die casting alloys were various compositions of tin and lead, but their use declined with the introduction of zinc and aluminum alloys in 1914. Magnesium and copper alloys quickly followed, and by the 1930s, many of the modern alloys still in use today became available. The die casting process has evolved from [...]

30 11, 2016

Do you know digital prototyping about mold making?

Digital prototyping gives plastic molding making designers and engineers the ability to virtually explore a complete product before it is built;so they can design, visualize and simulate products from the conceptual design phase through the manufacturing process. By using a digital prototype, users access real-world performance of a design with less reliance on costly physical prototypes. While simulation has been a part of plastic mold making processes for quite some time, it has historically been used to drive troubleshooting and validation efforts, rather than design. The problem with limiting simulation to these areas is that it focuses on problem fixing and problem-avoidance, rather than on trying to create truly optimized designs. Simulation software should predict and optimize how components will perform throughout each phase of the design and manufacture process. Digital prototyping aims to bring simulation into the process much earlier, so designs can be [...]

26 11, 2016

7 Causes and treatment of defects in die heat treatment(2)

When mold manufacturing, you may know some about die heat treatment as followings: Fourth, decarbonization Decarbonization is result of that the steel in the heating or insulation, due to the role of the surrounding atmosphere, the part of the surface layer of carbon all or part of the loss of the phenomenon and reaction. Decarburization of steel will not only result in insufficient hardness, quenching crack and heat treatment deformation and chemical heat treatment defects, but also on fatigue strength, wear resistance and mold performance also has a great impact. Fifth, the electrical discharge caused by the crack In the mold manufacturing, the use of EDM (electric pulse and wire cutting) is more and more commonly used in processing methods, while with the extensive application of EDM, the defects caused by a corresponding is increasing. Since the electric discharge machining is a processing method of [...]

22 11, 2016

7 Causes and treatment of defects in die heat treatment

For die casting mold making, there are 7 Causes and treatment of defects in die heat treatment. First, quench crack   Shape effect. Mainly caused by design factors, such as the fillet R is too small, improper hole location, cross-section of the transition is not good.   Overheating (over-burning). Mainly by the temperature control are not allowed or running temperature, process temperature is too high, uneven temperature factors, preventive measures include: overhaul, proofreading temperature control system, modify the process temperature, in the workpiece and the furnace floor plus horn. Decarburization. Mainly by the overheating (or over-burning), the air furnace without protection heating, machine plus margin is small, forging or heat treatment residual decarburization layer and other factors, preventive measures are: controlled atmosphere heating, salt bath heating, vacuum furnace, Type furnace using packing protection or the use of die casting mold making; machining allowance increased 2-3mm.   Improper [...]

16 11, 2016

How to choose the best resin material for your plastic part?

This review of plastic resins is an article in our series on how to make a quality plastic injection molded part. It will focus on the basic characteristics of polymers with some examples of popular resins and their applications. To select the best resin for your manufacturing project, answering the questions  below will help guide you to the right material. First, what is the intended end use of the part? -         Does the part need to be rigid or flexible? -         Does the part need to withstand pressure or weight? -         Will the parts need to withstand certain temperature variations? -         Will the parts be exposed to other elements or chemicals? Second, are there special appearance considerations? -         Is a specific finish required? -         Does a color need to be matched? -         Is embossing a consideration? Third, what, if any, regulatory requirements apply? -         Will [...]

12 11, 2016

The Heavy Truth about Injection Molds

Seven hundred pounds of hardened stainless steel. That’s the average weight of a compression molding part. Some can weigh over a ton, some just a few hundred pounds, but any way you slice it, you certainly wouldn’t want one to fall on your foot. So how do you get this massive piece of metal to produce intricate plastic parts? It’s all in the tooling. Using CNC EDM machines to create the base of the compression molding part, it is the work of the tool maker to refine the steel to exact specifications. Precision work on the cavities is only part of the equation. The tool must also include gating to allow for proper melt flow and vents to allow gas and air to escape. Without the proper placement of these key features, parts will be subject to imperfections. If you are working with a turnkey plastic [...]

9 11, 2016

3 questions you need have consider before you need molds

What quantities are needed? All injection molds are not made alike. If you are interested in smaller quantities or a shorter production run, an aluminum mold might be the best option. If your project requires large quantities over a longer time span, then a hardened stainless steel mold would be the best choice. The upfront cost of the latter option is much greater; however it pays for itself over the life of the tool. What is the size and complexity of the part? While many plastic parts are made through injection molding, there are other molding processes that can be used to produce a part. You can read about them in a related article. Briefly, smaller parts that are more complex are ideally suited to the injection molding process. Larger parts may be produced with injection molding or compression molding. Very large parts lend themselves [...]