(1) The molding cycle in the entire production process is long, the efficiency is low, and it has a significant physical burden on the operators.

(2) It is not suitable to use compression molding for complex products with depressions, side slopes, or small holes.

(3) In the production process, it is difficult and requires certain skills to fully fill the mold.
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(4) After the curing stage, different products have different stiffness, which has an impact on product performance.

(5) For products with high precision requirements (especially for multi cavity molds), this process has some limitations.

(6) The flash edge of the product is relatively thick, and the amount of work required to remove the flash edge is large.

(7) The shortcomings of compression molding are that the mold production is complex, the investment is large, and it is constrained by the press machine, making it suitable for mass production of small and medium-sized composite material products.

The article originates from SMC molded products: http://www.jmlicheng.com/