A manufacturing method for a foam sandwich structure 
composite material hatch, the technical points of which include designing and optimizing the overall structure and layering of the hatch, completing the design and manufacture of molds, selecting 
fiber cloth and according to the size of the actual product  According to the requirements, the material is 
cut, the foam material and embedded parts are selected, and the preparation of the prefabricated body is completed. The release cloth, the flow guide net and the glue injection support are laid in sequence on the inner 
skin cloth, and the air duct is fixed around the prefabricated body.  Cover with sealing tape and vacuum bag film, connect the 
exhaust pipe and carry out process combination, vacuumize at 
room temperature, prepare the required resin in the material 
barrel, introduce the resin into the prefabricated body, and after the resin infiltrates the 
fiber, according to the curing process of the resin, 
room temperature or  Heating and curing, after curing, cool down to 
room temperature naturally, turn off the vacuum 
system, and post-process the parts after demoulding; this technical solution has obvious weight reduction effect, strong designability, stable product shape and size, excellent 
thermal insulation performance, and good damping  The 
noise reduction performance is obvious.