Zhejiang Aobang Technology Co., Ltd.
Zhejiang Aobang Technology Co., Ltd.
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  • No.62 zhidailang, Sha Village, Luoshe Town, Deqing, Huzhou city, Zhejiang, China
  • info@waiwaitree.com
  • +86-15657163173
SMC moulding process is an advanced composite material forming method, and the die is the basis of SMC process. Good product quality is guaranteed by reliable dies. Therefore, in the design of SMC moulding process, the design of dies is particularly important.

Machining accuracy requirements
The machining accuracy of the new die mainly includes three aspects: dimension tolerance, shape tolerance and surface roughness. Usually, the machining accuracy requirements for die manufacturers are mainly dimensional tolerance and surface roughness. Dimensional tolerance can be roughly divided into shape size and cavity size. These two kinds of requirements for the shape size of the die are relatively loose, and the actual processing size and the theoretical dimension error of the die drawings are not more than (+1.5mm) qualified. The dimension accuracy of the surface die cavity must be strictly controlled according to the drawings, generally not exceeding 0-0.1 mm. The surface accuracy of the die generally refers to the surface roughness. After treatment, the roughness of the die cavity is generally required to be 0. According to the actual product surface requirements, we can put forward the corresponding die surface processing accuracy.

Design of demoulding slope
Because of the shrinkage of SMC products after cooling, it will make the products tightly encapsulate the core of the die and the protruding part of the cavity. In order to remove the product smoothly and prevent the product from being damaged or scratched during demoulding, the internal and external surfaces of SMC products should have sufficient demoulding slope along the demoulding direction when designing SMC products.

In the design, the following two aspects should be paid attention to: (1) When moulding large SMC products, the stripping slope of the inner surface should be greater than that of the outer surface; (2) The commonly used demoulding slope is 1-1.5 degrees, or less than 0.5 degrees.


  • Automotive

    Sheet molding compound (SMC) mold can be used to manufacturing parts of cars, buses, trucks, transport and special vehicles.

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  • Energy/Power Generation
    Energy/Power Generation

    BMC and SMC are used to make xenon lamp HID luminaires because they can withstand the high temperatures that luminaires can withstand.

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  • New Energy Vehicle
    New Energy Vehicle

    Sheet molding compound (SMC) mold can be used to manufacturing parts of new energy vehicle.

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  • Transportation Equipment
    Transportation Equipment

    BMC and SMC are used to make outdoor large-scale transportation equipment bearing housing, bearing cover, sealing ring, non-oxidizing.

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  • High-speed Rail
    High-speed Rail

    The bulk molding compound (BMC) and sheet molding compound (SMC) are different from these materials.

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  • Building Materials
    Building Materials

    Our BMC ceiling and wallboard materials have been developed for more than ten years, and the technology is constantly being updated.

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  • Ship

    Sheet molding compound and bulk molding compound are widely used for Ship. Click here for more info about the SMC & BMC material.

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  • Electrical Appliances
    Electrical Appliances

    BMC can be used for household appliance, such as frying pan lids and brackets, as well as kitchen component materials such as oven endplates.

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  • Motor

    BMC plastic motor mold replaces the traditional iron shell and aluminum products, reduces the process, stronger sealing, higher safety factor, less noise.

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  • High And Low Voltage Electrical Switch
    High And Low Voltage Electrical Switch

    BMC & SMC is used to make parts with resistance to electrical marks greater than 600 minutes and arc resistance greater than 180 seconds.

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  • Outdoor Supplies
    Outdoor Supplies

    The fuel cell industry uses a large number of thermoset materials to make two plates. BMC and SMC are also suitable for use in solar tile and wind turbines.

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