• Design Fan Gate In Injection Mold

    What is fan gate? Fat gate, namely ,the shape of the gate looks like a fan.Fan gate is usually used on multi-cavity molds or two-plate molds. It is a common edge gate located located in the sidewalll of the part to prevent restriction of resin flow. Since the gate could distribute melt resin into the cavity more evenly, thus it is normally applicable to parts that require a high degree of flatness and absence of flow lines. It also minimizes the possibility of part warpage and helps to maintain dimensional stability.     From above pictures we could see that the fan gate has shortcomings as well. Since the gate is too wide and it may increase labor cost  to degate after molding. Besides the gate is long leaving visible trimming mark, it may affect cosmetic look as well. And there is high potentiality for air entrapment if not carefully…

    Mold making January 6, 2020
  • Soft Tooling VS Hard Tooling

    What is soft tooling? Soft tooling, or prototype mold is preferred when we need injection molded parts quickly or at a lower cost.  It is also great choice for low volumes. We can use soft steel such as NAK80 or  aluminum to build the soft mold in house. Once the mold has been completed,  we can make your parts in-house using our ton injection molding machine ranging from 50Ton to 650Ton.  The soft tooling is featured as below.   The tooling inserts are made using 718 HH or Nak 80, (preharden 33 to 38 HRC). Inserts can be drilled, milledand grindedusing normal process of machining. The tool life is guarantee up to 500 K shotwhile aluminium mold up to 10K shots. The lead time is shorter compare to hard tool. For Proto Tool or toolingwith low volume requirement. What is hard tooling? Hard tool is production tooling that requires high quality . The core and cavity is usually made of the…

    Mold making January 2, 2020
  • Everything you need to know about hot runner mold for engineering polymers

    When injection moulding partially crystalline engineering thermoplastics, choice of the correct hot runner system determines the function of the plastic injection mould and moulded part quality. Here, the temperature must be controlled much more strictly than in the case of amorphous materials. The type of hot runner system used,  and its installation, decide the properties of the finished parts. This article deals with the most important points which have to be considered when choosing the most suitable hot runner system for POM (acetal), PA (nylon), PBT and PET (polyesters). Problems with hot runners Moisture in thegranules Feed system toosmall Wrong gateposition Hold time tooshort Wrong melttemperature Wrong tooltemperature Poor surfacefinish Problems with hotrunners Warpage Moulddeposit   What happens when an unsuitable hot runner system is used? Unsuitable hot runner systems usually cause high pressure losses; they should, if used at all, be operated only at very high temperatures. This will usually cause the polymer to degrade, with…

    Mold design, Mold making January 1, 2020
  •  Everything you need to know about Acrylic injection Molding

    What is Acrylic Injection Molding? PMMA, also known as Acrylic or organic galss, is widely used in Plastic Injection Molding process. It is an environment friendly and 100% recyclable material. The clear thermoplastic homopolymer is often used as a more resistant alternative to glass. Acrylic is the most common type of clear, moldable plastic available to the general public, and it can be used from anything to windows and picture frames to fake nails and paint. In vehicles, PMMA sheets are used in windows of cars, interior and exterior panels, motorcycle windshields, instrument covers, spoilers, fenders, and other ancillaries.It facilitates the benefit of design customization for car manufacturers, owing to its exceptional formability, pleasant acoustic properties, and excellent surface hardness. The automotive industry has been witnessing growth, in terms of, both, investments and production, especially in countries in the Asia-Pacific region, such as India, Indonesia, Malaysia, and Thailand.Moreover, regions, such as North America and Europe,…

    Mold making December 31, 2019
  • What is plastic injection molding and what are the advantages?

    Injection molding makes possible mass production of intricate, high performance, tight tolerance parts with very little secondary labor and minimal waste. It is defined as a process of shaping plastic by melting it and injecting it into a predesigned mold. As known, plastic injection molding has a bevy of advantages and benefits over comparative plastic processing and manufacturing methods. Here’s a look at the top 11 benefits of plastic injection molding.   1.High production rate There is a reason why plastic injection molding is one of the – if not the most common – technologies for long manufacturing runs: it’s fast. How fast? While the speed depends on the complexity of the mold itself, generally only about 15 to 30 seconds pass between cycle times. 2.Large Volume production The initial creation of a mold can be expensive, with the cost being a few thousand dollars.   But once the mold is built you can…

    Mold making December 30, 2019
  • What is two shot injection molding?

    Two shot injection Molding, also called over-molding multi- component or 2K Injection molding, employs separate injection points for each material in a sequential process. After initial portion material or component is molded, the core half of the mold holding the part is rotated to another, cavity where a second resin is injected.  Below is a simple diagram to illustrate theory of twin shot injection molding.     There are 3 types of two shot injection molding.   Co-Injection Molding: Sequential injection into the same core / One material as the skin , one as the core of the products. Materials can be from the same type and/or be different internal /core.     Multi-Color Injection Molding: Part are same plastic material but usually different Material bond each other, but clearly separated.     § Multi-Material Injection Molding: Partmade of different plastic materials. Materialbond but usually clearly separated. Twin shop injection molding is easy to understand, but it’s…

    Mold making December 21, 2019
  • How to Design a Mold(the first part)

      INTRODUCTION The basic function of a mold is two fold. Firstly it should impart shape to the part secondly it should cool the molded part. The number of cavities mainly depends up on the production volume requirement. But it is also related to the size and weight of the parts which in turn determines the machine capacity required. It is also important to design a mold that will safely absorb the forces of clamping, injection and ejection. Further more the mold lay out should be balanced which will ensure proper filling and dimensional control DECIDING THE TYPE OF MOLD There are several types of injection molds in use today. Two plate. Multi plate mold. Hot runner mold Insulated hot runner mold Hot runner manifold stack mold   A two plate mold has got only single day light (one opening). All basic designs of injection molds have this design thought….

  • Everything you need to know about Insert mold  

    What is injection molding process? INSERT MOLDING is a type of injection molding. It is the process of molding thermoplastic material around an metal part to create a finished part that incorporates multiple materials.   The inserts for INSERT Moulds are typically metal stamping or thread parts.   The inserts are most commonly made of metal, typically brass, aluminum or stainless steel.  Threaded inserts are readily available in a number of standard sizes.  Bushings, sleeves and other simple metal forms are also used. Before injection molding, the inserts are placed on a fixed position in the mold and thermoplastics is injected into the mold to form the part. Most moldable thermoplastic resins are compatible with the insert molding process. This kind of products are usually used as structural parts in product development, and the strength requirements of the products are higher, so plastic material containing glass fiber (GF) is often chosen, and the content of GF in…

    Mold design, Mold making December 9, 2019
  • Everything that you need to know about plastic hor runner mold

    The hot runner is heated to ensure that the plastics of the runners and gates remain in molten condition. Why do we recommend it? If the plastic injection product is large without  using hot runner system, it is prone to occur the defect of shortage shot. Since there is heating rod and heating ring near or in the center of the runner, the entire flow path from the nozzle exit of the injection molding machine to the gate is kept in a high temperature state, so that the plastic through the whole path remains in a molten condition.  Therefore there is no need to take out the condensed resin after shutdown and just heat the runner to required temperature after restart.  In general, hot runner processes are sometimes referred to as hot manifold systems. Advantages and disadvantages of hot runner technologyAds.1. Save raw materials and reduce costs.2, shorten the molding cycle and improve machine efficiency3. Improve the surface quality and…

    Mold design, Mold making November 1, 2019
  • What determines the price of plastic mold?

    As known, no matter what we buy, there are always different levels of quality in proportion with price. The plastic mold industry in China is flooded with companies of different levels. With more and more start-up companies in recent years, the product requirements on domestic market are becoming more and more strict. Some molds produced by certain domestic mold enterprises are in line with the European and American standards. We all know that export plastic molds are more expensive because the standard is not the same. American plastics industry association (SPIAN-102-78) classify plastic molds into five categories. Each type has its own requirements, and this classification is only applicable to plastic injection molds up to 400 tons.   TYPE 1O1 MOLDCycles: One million or moreDescription: Built for extremely high production. This is the highest price mold and is made with only the highest quality materials. The requirements are listed in detail as below:   1) detailed mold design materials are required.  …

    Mold making September 30, 2019
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