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  • +86-15657163173
According to the characteristics of composite materials and the practical experience in the process, the key points of die design for SMC process are summarized. Detailed elaboration is made from ten aspects, and the key points of SMC die design control by die manufacturer are given. 

In the design process of SMC die pressing apparatus, the cavity of the die should be designed according to the specific size of the product. In addition, the appropriate materials should be selected according to the surface quality requirements and demand of the products. In order to ensure product quality and process feasibility, the cutting edge and ejection system of the die should be reasonably designed.

Parting surface design
In order to make the product easy to demould, ensure the product precision, strength and facilitate the processing of the die, the following principles should be taken into account in the selection of parting surface: (1) In order to make the product easy to launch and simplify the ejection mechanism, the position of parting surface should keep the product in the lower die as far as possible after opening the die. (2) To minimize the damage to product appearance caused by flying edge, and at the same time, it should be easy to remove the residual flying edge; (3) Easy to manufacture and process die parts; (4) For products with high requirement of radial dimension accuracy, the influence of flying edge thickness on product accuracy should be considered, and the vertical parting surface should be taken to ensure the radial accuracy of products. (5) Guarantee the strength of the product and avoid sharp corners and thin walls.

The design of parting surface is very important. In the early stage of die design, parting design should be carried out to draw parting design drawings to ensure that the product can be demoulded smoothly and easy to produce.


  • 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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