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Rotation parts
Rotation parts
Rotation parts
Rotation parts
Rotation parts
Rotation parts
Product Detail

Rotation parts

  • Rotational molding parts are hollow plastic products made through the rotational molding process.
  • They are characterized by the absence of weld seams, uniform wall thickness, and complete seamless structure.
  • These parts are commonly used in large or complex shell structures.
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    The core feature and application: 

    Feature Application
    seamless overall molding without welds,

    adjustable wall thickness,

    high edge strength,

    excellent impact resistance and corrosion resistance,

    and suitability for large and complex irregular structures.

    		 large storage tanks (for chemical processing / water treatment),

    transportation facilities (impact-resistant barrels / isolation pillars),

    ship components (fuel tanks / pontoons),

    cold chain containers,

    amusement facilities and outdoor protective shells, etc.

     

    The advantage in process and design:

    Large-scale / versatile adaptability ² There is virtually no size limit.

    ² It can form extremely complex curved surfaces, multi-chamber structures, and integrated structures with inserts.
    Low mold cost and quick development ² The mold structure is simple (without core slider), and the cost is approximately 1/3 to 1/4 of injection molding or blow molding, suitable for small batch and multiple varieties.
    Excellent surface reproducibility ² It can accurately reproduce the texture of molds (such as leather texture, stone texture), making it easy to directly obtain the decorative effect.
    Color change and cleaning are convenient ² Just clean the mold and you can switch the color. The production is flexible.

     

    Pay attention matter and limit:

    Long production cycle ² The heating – rotation – cooling cycle usually takes more than 30 minutes,

    ² And it is not suitable for ultra-large-scale and high-speed production.
    Low dimensional accuracy ² The shrinkage rate fluctuates greatly, with the tolerance usually being ±5%.

    ² Precision components require secondary processing.
    Raw material limitations ² Mainly applicable to polyethylene (PE), requires dedicated powder or paste resin.

    ² The available material options are fewer than those for injection molding.
    Surface texture difference ² Non-glossy high-gloss surface. Some areas may have slight orange peel texture or flow marks.

     

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    Die casting main feature: Die casting is a metal casting process that involves applying high pressure to molten metal within a mold. The main difference of die casting from other casting methods lies in the high pressure and high speed. Die-cast parts: complex shapes, thin walls, high precision, and a smooth surface with high dimensional consistency. The molds are typically made from stronger alloys, and this process is somewhat similar to injection molding. Which materials are suitable for die casting? Most die-cast parts are quite rare, but it is still feasible. Based on the different metal materials and applications, die castings can be classified as copper die castings, zinc die castings, aluminum die castings, etc. Used for die casting mainly material: zinc, copper, aluminum, magnesium, lead, tin, and lead-tin alloys. The more special die-casting metals: ZAMAK, aluminum-zinc alloys, And the standards of the American Aluminum Association: AA380, AA384, AA386, AA390, and AZ91D magnesium. The advantages and shortcoming of die-casting: Advantages the castings have excellent dimensional accuracy. Shortcoming The main drawback of die casting is its high cost. The equipment for die casting, as well as the molds and related components, are relatively expensive compared to other casting methods. Therefore, it is more economical to produce a large quantity of parts when manufacturing die castings. The processing of die-cast parts mainly steps: Mold preparation, filling, injection, sand removal and post-treatment. Step Specification Mold Preparation During the preparation process, a lubricant needs to be sprayed into the mold cavity. The lubricant not only helps control the temperature of the mold but also facilitates the removal of the castings. Filling and Injection After closing the mold, high pressure is used to inject the molten metal into the mold. The pressure range is approximately between 10 and 175 megapascals. Once the molten metal is fully filled, the pressure will remain constant until the casting solidifies. Sand removal The pusher rod removes all the castings and separates the residues, including the mold opening, risers, gates, and burrs. This process is usually accomplished by pressing the castings through a specially designed finishing mold; Other methods include sawing and grinding. Post-processing During the production process of die-cast parts, problems such as bubbles and burrs may occur, And there may also be residual mold sand and oxide scale. Therefore, after the die-cast parts are manufactured, post-processing work needs to be carried out, including grinding, polishing, spraying, electroplating and other processes. The purpose is to make the surface of the die-cast parts more beautiful, while improving their corrosion resistance and mechanical properties.

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    Rotation parts

    Rotation parts