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Molds For Plastic  Injection Molding Production

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Professional Plastic Injection Mold Manufacturing Service

Production Tooling In Manufacturing

King Sjeng is proud to offer the finest tool-making and high-volume production services to support your most ambitious plastic injection molding projects. Our meticulous process control and positive material identification help ensure that hundreds of thousands or even millions of complex parts and assemblies can be made with consistent cycle times and the lowest possible cost per piece. We’re independently certified to ISO 9001 standard to ensure complete peace of mind. 

    What is Production Tooling in Manufacturing?

    Production tooling refers to plastic injection molding tools that are built to withstand the rigorous demands of mass production while maintaining tight dimensional tolerances on every finished part.
    To do this successfully, tooling manufacturers must bring together the finest raw materials, advanced MoldFlow software, professional tool design, and precision machining in order to build a production tool that can be cycled hundreds of thousands or even millions  of shots without degrading. Not every manufacturer is able to provide this level of experience or attention to detail.

    What molds can we process for you?

    ● Single color molds are our advantage, and double color molds, over molds (2 time molding mold), and automatic thread-removing injection mold are our “signature dishes”.
    ● Whether it's a cold runner mold or a hot runner mold, we have the ability to complete excellently, and our happiest thing is to see your satisfied smile.
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    Single color mold

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    Insert mold

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    Overmold

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    Bicolor mold

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    Automatic thread-removing injection mold

    Mold Manufacturing-Main Machines

    • Mold Manufacturing-Main Machines (7)j5o

      Grinder: 2 sets

    • Mold Manufacturing-Main Machines (6)74s

      Milling machine: 2 sets

    • Mold Manufacturing-Main Machines (1)lau

      High-Speed WEDM 2sets

    • Mold Manufacturing-Main Machines (4)h4v

      Middle-speed WEDM 2 sets

    Injection Mold Manufacturing-Main Machines

    • Mold Manufacturing-Main Machines (5)s80

      EDM: 2 sets

    • Sodick-mirror-EDMnq3

      Mirror EDM: 1 sets

    • Mold Manufacturing-Main Machines (3)n70

      EDM: 2 sets

    • Mold Manufacturing-Main Machines (1)75a

      CNC: 2 set

    Injection Mold Manufacturing-Workshop

    • Mold-making-workshop1 (1)tir

      CNC machining

    • Mold-making-workshop1 (5)897

      EDM  processing

    • Mold-making-workshop1 (4)9rp

      Mirror spark  processing

    • 1

      Grinder

    • Mold-making-workshop1 (2)kkv

      Mold assembly

    How to make high-quality molds?

    Excellent molds originate from excellent designs. 

    ● Mold design is the most important fundamental factor affecting the quality of the mold, and of course the quality of the parts that it make.
    ● Mold design is a creative work, which not only requires designers to have professional skills and rich experience, but also requires rich imagination and creativity. 
    ● A good design is one that allows the cavities to be completely  filled in the shortest time, while maintaining stable and repeatable dimensional tolerances for all the features of the part. 
    ● Achieving this level of stability over mass production runs requires very careful design and manufacture of the mold’s cooling channels. This helps the mold tool to withstand the thermal stress of thousands or even millions of heating and cooling cycles.
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    • Mold-making-mirror-EDMtn4

    The selection of correct and qualified steel is the fundamental guarantee for making qualified molds

    ● There are many types of hardened and semi-hardened tool steels to choose from, including P20, NAK80, H13, and S136. They differ in the degree of corrosion resistance, toughness, thermal efficiency, and the ability to take a high polish. 
    ● That’s why the choice of tool material that’s best suited for your project depends on your intended production volume, the surface finish of the part, the type of resin that’s being injected, and the complexity of the tool design.
    ● After communicating with you, our professional mold designers will determine which material to use based on your specific product structure, usage condition, ets.
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    • Mold-making (2)d14
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    Reasonable cost investment is a necessary guarantee for products to meet ideal requirements

    ● There is a saying in the industry, "70% molds, 30% injection molding", which is the importance of molds to products. There are simply too many variables to consider. However, we can identify the main cost drivers:
    ● Design complexity;
    1) Number of cavities;
    2) Mold tool steel;
    3) Surface treatment of the mold (polishing, plating, vapor deposition, etc.)
    4) Hot runner system
    ● The production molds can be a significant initial investment, but for high-volume production, the important question is cycle times and cost-per-piece.
    If the tool is made correctly, then it can be cycled more quickly and last much longer, which saves money in the long run.
    We will provide customers with a very reasonable mold cost, but more importantly, the quality and longevity of the molds are worth valuing.
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    • Mold-making (2)8pf
    • Mold-making (3)cdg

    ● A well-established supply chain

    • Frequently-used hot runner system

      Plastic Mold Manufacturing detail1o74
    • Frequently-used steel

      S136
      2316
      718S
      PAK90
      420
      P20
      NAK80
      H13

    What are the advantages of using a hot runner?

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