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Step 4Method#3- using an existing item for a mold
In this case I wanted to make a hidden subwoofer enclosure for my car by molding a fiberglass tub that sat inside the spare tire so I wouldn't lose any trunk space.
I first started by covering the inside of the spare tire wheel with clear packing tape and giving it a good coat of mold release wax.
Next I cut a large ring from MDF and placed it on top of the spare tire.
Then I started laying up my fiberglass ( I used CSM for this) into the taped spare tire. The fiberglass was applied so that it overlapped the upper surface of the MDF ring. This made the finished molded tub much stronger and made it much easier to remove from the spare tire after molding.
After the resin cured I cut another MDF ring to mount my subwoofer into and joined it to the MDF ring that was molded into the fiberglass tub. I used some sealant between the two rings and also screwed them together.
Then I drilled a hole in the hole in the MDF for my subwoofer wiring and applied sealant to it after I ran my wiring to the woofer. The last step was to bolt the subwoofer into place.
The volume of the molded tub turned out to be perfect for a 10" subwoofer and it sounds great without taking up additional trunk space- and I get to keep my spare tire!
I first started by covering the inside of the spare tire wheel with clear packing tape and giving it a good coat of mold release wax.
Next I cut a large ring from MDF and placed it on top of the spare tire.
Then I started laying up my fiberglass ( I used CSM for this) into the taped spare tire. The fiberglass was applied so that it overlapped the upper surface of the MDF ring. This made the finished molded tub much stronger and made it much easier to remove from the spare tire after molding.
After the resin cured I cut another MDF ring to mount my subwoofer into and joined it to the MDF ring that was molded into the fiberglass tub. I used some sealant between the two rings and also screwed them together.
Then I drilled a hole in the hole in the MDF for my subwoofer wiring and applied sealant to it after I ran my wiring to the woofer. The last step was to bolt the subwoofer into place.
The volume of the molded tub turned out to be perfect for a 10" subwoofer and it sounds great without taking up additional trunk space- and I get to keep my spare tire!
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I like the subwoofer idea! Will try to build one for my car too...